CN117620978A - Auxiliary handle for impact tool and impact tool - Google Patents
Auxiliary handle for impact tool and impact tool Download PDFInfo
- Publication number
- CN117620978A CN117620978A CN202310675788.5A CN202310675788A CN117620978A CN 117620978 A CN117620978 A CN 117620978A CN 202310675788 A CN202310675788 A CN 202310675788A CN 117620978 A CN117620978 A CN 117620978A
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- Prior art keywords
- handle
- impact
- handle shaft
- shaft
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 239000000872 buffer Substances 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 description 13
- 239000000806 elastomer Substances 0.000 description 11
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
- B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
- B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Portable Power Tools In General (AREA)
Abstract
The invention provides an auxiliary handle for an impact tool and an auxiliary handle. The auxiliary handle for the impact tool is provided with a connecting mechanism (12), and the connecting mechanism (12) connects the handle main body (20) to the top end part of the handle shaft (10) in a manner of being capable of sliding along the impact direction. By sliding the handle body (20) in the impact direction by the connection mechanism (12), the impact in the impact direction is absorbed. The connecting member (21) moves radially within the through hole (10 e), thereby sliding the handle body (20) in the impact direction. The impact in the impact direction is also absorbed by the 1 st cushion (24, 25), the 2 nd cushion (28) and the 3 rd cushion (29). Accordingly, the impact absorbing function of the assist grip can be further improved.
Description
Technical Field
The present invention relates to an auxiliary handle for an impact tool, for example, called a hammer drill (hammer drill), and an impact tool.
Background
As disclosed in patent documents 1 and 2, an impact tool called a hammer drill has a main handle (main handle) that a user holds with one hand and an auxiliary handle that holds with the other hand. The user holds the impact tool with both hands to perform, for example, a drilling operation of a concrete wall or a chiseling operation of a concrete floor. Since a user receives a large impact in the impact direction during work, for example, an auxiliary handle is being studied for absorbing the impact.
[ Prior Art literature ]
[ patent literature ]
Patent document 1: japanese patent application laid-open No. 6612157
Patent document 2: U.S. patent application Ser. No. 9242363
Disclosure of Invention
[ problem to be solved by the invention ]
In the related art, an auxiliary handle is configured to support a handle body by sandwiching an elastic body such as a sponge (sponge) between the auxiliary handle and a handle base (grip base) coupled to the tool body, thereby absorbing an impact applied to a user's hand. However, the impact absorbing structure of the related art has the following problems: if a large pressing load is applied to the handle body in the impact direction, the impact absorbing function (vibration preventing function) of the elastic body is lowered, and thus the burden on the user increases. In this regard, there is a need for further improving the shock absorbing function of the assist grip in the prior art. The invention aims to further improve the impact absorbing function of an auxiliary handle.
[ solution for solving the problems ]
According to an aspect of the present invention, an auxiliary handle for an impact tool includes a handle shaft extending from a tool body for reciprocating a tip tool in an impact direction so as to intersect the impact direction, and a tubular handle body; the handle body covers a handle shaft. The auxiliary handle for the impact tool has a connection mechanism that connects the handle body to the distal end portion of the handle shaft so as to be slidable in the impact direction, for example.
Therefore, by sliding the handle body in the impact direction with respect to the handle shaft, the impact in the impact direction can be absorbed. Accordingly, the impact absorbing function in the impact direction to the user holding the handle body can be further improved. Thereby reducing the burden on the user of the impact tool.
According to another embodiment of the invention, the impact tool has an auxiliary handle for the impact tool, for example. Therefore, the impact absorbing function in the impact direction for the user who grips the assist grip and uses the impact tool can be further improved. Thereby reducing the burden on the user of the impact tool.
Drawings
Fig. 1 is a longitudinal section of an impact tool.
Fig. 2 is an overall perspective view of the assist grip according to embodiment 1.
Figure 3 is a view from iii in figure 2 and is a right side view of the auxiliary handle according to embodiment 1.
Figure 4 is a cross-sectional view of IV-IV of figure 3 and is a longitudinal cross-sectional view of the assist handle according to embodiment 1.
Fig. 5 is a cross-sectional view of v-v in fig. 4, and is a longitudinal sectional view of the handle shaft and the handle body according to embodiment 1.
Figure 6 is a cross-sectional view of VI-VI of figure 4 and is a cross-sectional view of the attachment mechanism according to embodiment 1.
Figure 7 is a cross-sectional view of VII-VII of figure 4 and is a cross-sectional view of a 2 nd cushioning member according to embodiment 1.
Figure 8 is an overall perspective view of the assist grip according to embodiment 2.
Figure 9 is a view from direction ix in figure 8 and is a right side view of the auxiliary handle according to embodiment 2.
Fig. 10 is a sectional view of x-x in fig. 9, and is a longitudinal sectional view of the assist grip according to embodiment 2.
Fig. 11 is a cross-sectional view of xi-xi in fig. 10, and is a longitudinal sectional view of the handle shaft and the handle body according to embodiment 2.
[ description of reference numerals ]
1: auxiliary handle (embodiment 1); 2: auxiliary handle (embodiment 2); 10: a handle shaft; 10a: a fastening part; 10b: a flange portion; 10c: an engagement concave portion; 10d: a wide portion (reduced diameter portion) of the opposite side; 10da, 10db: a flat surface; 10e: a through hole; 10f, 10g: a receiving surface; 11: a fixing screw; 12, a connecting mechanism; 20: a handle body; 20a: an opening portion; 20b, 20c: a connection base portion; 20d, 20e: a support hole; 20f, 20g: a concave portion; 20h: an expanded diameter portion; 21: a connecting member; 21a, 21b: a flat surface; 22. 23: an end cap; 24. 25: 1 st buffer member; 26. 27: an elastomer layer; 28: a 2 nd buffer member; 28a: a longitudinal side portion; 28b: a lateral side portion; d1: the thickness of the longitudinal side portion 28 a; d2: the thickness of the lateral side portion 28 b; 29: a 3 rd buffer; 30: a handle shaft (embodiment 2); 30a: a fastening part; 30b: a flange portion; 30c: an engagement concave portion; 30d: a wide portion (reduced diameter portion) of the opposite side; 30da, 30db: a flat surface; 30e: a through hole; 30f: a narrow width portion; 31: a fixing screw; 32: a connecting mechanism; 33: a connecting member; 40: a handle body (embodiment 2); 40a: an opening portion; 40b, 40c: a connection base portion; 40d, 40e: a support table seat; 40f, 40g: a concave portion; 41. 42: an end cap; 43. 44: 1 st buffer member; 45. 46: a 2 nd buffer member; 47: a 3 rd buffer; 48. 49: an elastomer layer; 50: impact tools (hammer drills); 51: a tool body; 52: a handle portion; 53: a vibration-proof mechanism; 54: a main body housing; 54a: a handle mounting portion; 54b: an engagement convex portion; 55: chuck (chuck); 56: a handle portion; 57: a base portion; 58: a switch operation handle; 59: a switch main body; 60: an impact mechanism; 61: an electric motor; m: a motor axis; 62: bevel gears (bevel gears); 63: an intermediate shaft; j: an axis of the intermediate shaft 63; 64: a power conversion part; 65: a piston; 66: an impact member; b: a drill bit; p: an output axis; w: a workpiece; 67: tool holders (tool holders); 68: a middleware; 70: a battery pack (battery pack); 71: a battery mounting portion; 72: a controller (controller).
Detailed Description
In 1 or more embodiments, the auxiliary handle for an impact tool has a 1 st cushion material, which is provided between the tip end portion of the handle shaft and the handle body, for example, and absorbs an impact of the handle body in the impact direction on the handle shaft.
Therefore, the impact in the impact direction of the handle body is absorbed by the 1 st cushioning material, and the impact absorbing function of the assist handle can be further improved.
In 1 or more embodiments, the auxiliary handle for an impact tool has a 2 nd buffer provided between, for example, a base portion of the handle shaft on the tool body side and the handle body, for absorbing an impact of the handle body on the handle shaft in the impact direction.
Therefore, the impact in the impact direction of the handle body is absorbed by the 2 nd cushioning material, whereby the impact absorbing function of the assist handle can be further improved.
In 1 or more embodiments, for example, the 2 nd bumper has a lateral side and a longitudinal side, wherein the lateral side is adjacent to the handle shaft in a direction orthogonal to the impact direction; the longitudinal side portion is thicker than the lateral side portion and is adjacent to the handle shaft in the impact direction.
Therefore, the impact in the impact direction can be absorbed more reliably by the longitudinal side portion of the 2 nd cushion member.
In 1 or more embodiments, for example, a 3 rd buffer is provided on the handle shaft, and the 3 rd buffer is harder than the 2 nd buffer and abuts against the handle body after the 2 nd buffer is elastically deformed.
Therefore, when an impact exceeding the impact absorbing function of the 2 nd cushion is applied to the handle body, the 3 rd cushion can prevent the handle body from directly abutting against the handle shaft. Accordingly, the impact absorbing function of the assist grip can be improved.
In 1 or more embodiments, for example, the connection mechanism has an abutment surface on at least one of the handle shaft and the handle body, the abutment surface extending in the impact direction, and the other of the handle shaft and the handle body abuts against the abutment surface.
Therefore, by bringing the other of the handle shaft and the handle body into contact with the contact surface, the handle body is slidably supported with respect to the handle shaft in the impact direction.
In 1 or more embodiments, for example, the connection mechanism has a through hole and a connection member, wherein the through hole penetrates the handle shaft in a direction orthogonal to the impact direction; the connecting part penetrates through the through hole and is connected with the handle main body. For example, the connecting member has a flat surface parallel to the impact direction as an abutment surface, and the through hole of the handle shaft has a receiving surface facing the flat surface of the connecting member as an abutment surface.
Therefore, the connecting member is not rotated about the shaft but is moved in parallel in the impact direction (radial direction of the connecting member) to be in sliding contact with the receiving surface, and the handle body slides in the impact direction. Accordingly, the impact in the impact direction can be absorbed.
In 1 or more embodiments, for example, the through hole of the handle shaft has a long slot shape long in the impact direction, and the inner surface of the through hole has a receiving surface.
Therefore, the handle body can be reliably slid with respect to the handle shaft by the connecting mechanism having a simple structure.
In 1 or more embodiments, for example, the connection mechanism has a through hole and a connection part, wherein the through hole penetrates the handle shaft in the impact direction; the connecting part penetrates through the through hole and is connected to the handle main body.
Thus, the handle body is slid in the impact direction with respect to the handle shaft by the movement of the connecting member in the impact direction (the axial direction of the connecting member) within the through hole of the handle shaft. Accordingly, the impact in the impact direction can be absorbed.
In 1 or more embodiments, the handle body has an elastomer layer on at least an outer surface in an impact direction, and the elastomer layer is integrally formed with a resin layer harder than the elastomer layer.
Therefore, the impact in the impact direction can also be absorbed by the elastomer layer. Thereby reducing the burden on the user.
Examples (example)
As shown in fig. 1, the assist grip 1 according to embodiment 1 is used by being attached to an impact tool 50 called a hammer drill. The impact tool 50 is a relatively large hand-held tool, and has a tool body 51 and an annular grip portion 52, wherein the tool body 51 houses an impact mechanism 60; the handle portion 52 is to be held by a user. A plurality of sets of vibration isolation mechanisms 53 are interposed between the tool main body 51 and the handle portion 52, and the vibration isolation mechanisms are not rigidly coupled but are elastically supported by each other. The vibration isolation mechanism 53 is a member mainly composed of a compression coil spring, and has a function of absorbing an impact generated on the impact mechanism 60 side of the tool main body 51 and suppressing transmission of the impact to the handle 52 side.
The tool body 51 has a body housing 54. The impact mechanism 60 is built into the main body housing 54. The impact mechanism 60 has an electric motor 61 as a driving source. The electric motor 61 is supported in a longitudinal posture such that the motor axis M is located in a vertically parallel position. The rotational output of the electric motor 61 is transmitted to the intermediate shaft 63 via the bevel gear 62. The intermediate shaft 63 is supported rotatably about the axis J in a lateral posture in which the axis J is located in a front-rear parallel position.
By the rotation of the intermediate shaft 63, the power conversion member 64 swings forward and backward. The power conversion member 64 is connected to the piston 65. Thus, by the rotation of the intermediate shaft 63, the piston 65 reciprocates back and forth. The striker 66 moves forward by the air pressure generated by the reciprocation of the piston 65, and abuts against the intermediate member 68. The rear end of bit B is impacted by the intermediate member 68. The bit B is impacted toward the workpiece W by the impact force of the intermediate member 68. In the case of the present embodiment, the axis of the drill B corresponds to the output axis P. The drill B is impacted forward (in the impact direction) along the output axis P.
By rotation of the intermediate shaft 63, the tool holder 67 rotates about the output axis P. The rear side of the tool holder 67 has a cylindrical shape. The piston 65 and the striker 66 are reciprocatably accommodated in the inner peripheral side of the tool holder 67. The drill B is detachably mounted to the front side of the tool holder 67. The drill B protrudes forward from a chuck 55 provided at the front of the main body case 54. By the rotational output of the electric motor 61, the drill B attached to the tool holder 67 is caused to perform a rotational operation about the output axis P and an impact operation in the direction of the output axis P.
The grip portion 52 has an annular shape spanning between the rear side upper portion and the rear side lower portion of the tool body 51. The handle portion 52 has a grip portion 56 and a pedestal portion 57 which are actually gripped by a user. The handle portion 56 is provided in a state extending upward from the rear portion of the base portion 57. The upper portion of the handle portion 56 is connected to the rear side upper portion of the tool main body 51 via the vibration isolation mechanism 53.
A switch lever 58 is provided on the front surface (inner side of the ring) of the handle portion 56. A switch main body 59 is mounted on the rear side of the switch lever 58. When the operation switch lever 58 is pulled to the rear side by the fingertip of the hand (for example, right hand) holding the handle portion 56, the switch main body 59 is turned on, and the electric motor 61 is started.
A battery mounting portion 71 for mounting 1 battery pack 70 is provided on the lower surface side of the pedestal portion 57. The battery pack 70 is a slide-mounted lithium ion battery having a rectangular parallelepiped shape, and is mounted so as to slide forward with respect to the battery mounting portion 71. The electric motor 61 is started with the electric power of the attached battery pack 70 as a power source. A rectangular flat-plate-shaped controller 72 is mounted in the pedestal portion 57. The controller 72 mainly controls the operation of the electric motor 61.
The user holds the handle portion 56 of the grip portion 52 with one hand (e.g., right hand) and holds the assist handle 1 with the other hand (e.g., left hand) to use the impact tool 50. The assist handle 1 is attached to a cylindrical handle attachment portion 54a provided at the front of the main body case 54. The assist grip 1 attached to the grip attachment portion 54a extends in a direction intersecting the impact direction (output axis P). Fig. 2 to 4 show the assist grip 1 detached from the grip attachment portion 54a. The assist handle 1 has a handle shaft 10 and a handle main body 20. The handle shaft 10 extends from the handle attachment portion 54a in a direction substantially orthogonal to the impact direction.
An elliptical flange portion 10b is integrally provided on an upper portion of the handle shaft 10. An annular fastening portion 10a is integrally provided on the upper surface side of the flange portion 10b. The fastening portion 10a is displaced in the diameter-reducing direction by tightening the fixing screw 11. The handle shaft 10 is coupled to the handle attachment portion 54a by positioning the handle attachment portion 54a on the inner peripheral side of the fastening portion 10a and tightening the fixing screw 11.
A plurality of engaging recesses 10c are provided on the inner peripheral side of the fastening portion 10a. By fitting the engaging convex portion 54b (see fig. 1) on the handle attachment portion 54a side into any of the engaging concave portions 10c, the position of the handle shaft 10 about the output axis P is fixed.
By unscrewing the fixing screw 11, the fastening portion 10a is elastically deformed in the diameter-expanding direction. Accordingly, the fastening portion 10a is loosened with respect to the coupled state of the handle attachment portion 54a, and the assist handle 1 can be detached from the handle attachment portion 54a. Further, by loosening the coupled state of the fastening portion 10a with respect to the handle attachment portion 54a, the position of the handle shaft 10 about the output axis P can be changed. In the state where the position is changed, the fixing screw 11 is tightened, and the engagement convex portion 54b of the handle attachment portion 54a is fitted into the other engagement concave portion 10c, whereby the position of the handle shaft 10 is fixed. Accordingly, the vertical posture (posture shown in fig. 1) of the assist handle 1 extending downward from the handle attachment portion 54a or the lateral posture extending leftward or rightward can be arbitrarily changed.
As shown in fig. 4 and 5, the handle body 20 has a cylindrical shape covering the periphery of the handle shaft 10. The handle body 20 is supported by the handle shaft 10 below the flange 10b. An opening 20a that opens laterally in a curved shape is provided in an upper portion of the handle body 20. The opening 20a is substantially closed by the flange 10b of the handle shaft 10. The grip portion is restricted at its upper end by the laterally enlarged opening 20a, thereby improving the gripping performance of the assist grip 1.
The handle body 20 is connected to the lower end portion of the handle shaft 10 by a connection mechanism 12. An opposite side wide portion 10d having left and right flat surfaces 10da, 10db is provided at the lower end portion of the handle shaft 10. Left and right connection base portions 20b, 20c are integrally provided at the lower end portion of the handle body 20. The wide-side portion 10d of the handle shaft 10 is interposed between the left and right connection base portions 20b, 20c.
The support holes 20d, 20e are provided in the left and right connection base portions 20b, 20c so as to be coaxial with each other. The left and right support holes 20d, 20e are formed as circular holes through which the connection member 21 can be inserted. 1 through hole 10e is provided in the handle shaft 10 at the opposite side width portion 10d. As shown in fig. 4 to 6, the through hole 10e penetrates the side-to-side wide portion 10d. As shown in fig. 5 and 6, the through hole 10e has a long slot shape with a long front-rear direction. As shown in fig. 4 and 5, flat receiving surfaces 10f and 10g are provided in parallel to each other above and below the through hole 10e.
1 connection member 21 is inserted between the left and right support holes 20d and 20e and the through hole 10e. The connecting member 21 is provided with upper and lower flat surfaces 21a, 21b parallel to each other. Therefore, the connection member 21 can move in parallel back and forth in the through hole 10e in a state where rotation around the shaft is restricted. With the coupling mechanism 12 thus configured, the lower portion of the handle body 20 is slidably coupled to the lower portion of the handle shaft 10.
The left and right end portions of the connecting member 21 protrude into recesses 20f and 20g provided in the handle body 20. The recesses 20f, 20g are closed by end caps 22, 23, respectively. The left and right end portions of the connecting member 21 are covered with end caps 22, 23. A diameter-enlarging portion 20h having a curved diameter is provided at a lower portion of the handle body 20. The left and right end caps 22, 23 are fitted into the concave portions 20f, 20g so as not to be exposed along the curved shape of the expanded diameter portion 20h. The grip portion of the handle body 20 is restricted at the lower end portion thereof by the enlarged diameter portion 20h, thereby improving the gripping performance of the assist handle 1.
As shown in fig. 5 and 6, the 1 st buffers 24 and 25 are interposed between the front surface of the side width portion 10d of the handle shaft 10 and the handle body 20, and between the rear surface of the side width portion 10d and the handle body 20, respectively. By the 1 st cushioning members 24, 25, the impact of the handle main body 20 in the impact direction is absorbed.
As shown in fig. 4 and 5, the 2 nd damper 28 is interposed between the opening 20a of the handle body 20 and the base 10h of the tool body 51 side of the handle shaft 10. The 2 nd cushioning material 28 is oval-shaped having a longitudinal side portion 28a and a lateral side portion 28b, wherein the longitudinal side portion 28a is adjacent to the handle shaft 10 in the front-rear direction (impact direction); the lateral portion 28b is adjacent to the handle shaft 10 in the left-right direction. The thickness d1 of the longitudinal side portion 28a is greater than the thickness d2 of the lateral side portion 28b (d 1> d 2). The impact of the upper side of the handle body 20 is mainly absorbed by the 2 nd cushion 28. Since the 2 nd cushion member 28 is formed such that the thickness d1 of the longitudinal side portion 28a is larger than the thickness d2 of the lateral side portion 28b, in particular, the impact absorbing capability in the front-rear direction (impact direction) is improved.
Below the 2 nd buffer 28, the 3 rd buffer 29 is mounted to the handle shaft 10. The 3 rd buffer 29 is mounted so as to extend over the entire circumference of the handle shaft 10. The 3 rd buffer 29 is, for example, a rubber O-ring. When an impact exceeding the impact absorbing capacity of the 2 nd cushion member 28 is applied to the handle body 20, the handle body 20 abuts against the 3 rd cushion member 29. Accordingly, the handle body 20 is prevented from directly abutting against the handle shaft 10. Accordingly, the impact absorbing capability of the assist grip 1 can be improved.
As shown in fig. 1, 2, 3, and 5, elastomer layers 26 and 27 are respectively coated on the front and rear surfaces of the handle body 20. The anti-slip of the user's hand is achieved by the elastomer layers 26, 27 and the impact in the impact direction is absorbed. The elastic body layers 26, 27 are coated on only the front and rear surfaces of the handle body 20, and the elastic body layers are omitted on the left and right side surfaces. The elastic body layers 26, 27 are integrally formed with the handle body 20 as a harder resin layer.
According to embodiment 1 configured as described above, in the connection mechanism 12 of the assist handle 1, the handle body 20 slides in the impact direction with respect to the handle shaft 10, so that the impact in the impact direction can be absorbed. Accordingly, the impact absorbing function in the impact direction with respect to the user gripping the handle body 20 can be further improved. Accordingly, the burden on the user of the impact tool 50 is reduced.
According to embodiment 1, the assist handle 1 has 1 st buffers 24, 25, the 1 st buffers 24, 25 being provided between the tip end portion of the handle shaft 10 and the handle body 20 for absorbing an impact of the handle body 20 on the handle shaft 10 in the impact direction. The impact in the impact direction of the handle body 20 is absorbed by the 1 st cushioning members 24, 25, so that the impact absorbing function of the assist handle 1 can be further improved.
According to embodiment 1, in the assist handle 1, the 2 nd buffer 28 is interposed between the base 10h of the tool body 51 side of the handle shaft 10 and the handle body 20. By the 2 nd cushion 28, the handle body 20 is absorbed from the impact of the handle shaft 10 in the impact direction. The thickness d1 of the longitudinal side portion 28a of the 2 nd cushion 28 is formed thicker than the thickness d2 of the lateral side portion 28b (d 1> d 2). Accordingly, the impact absorption energy in the impact direction can be further improved.
According to embodiment 1, a 3 rd buffer 29 is provided on the handle shaft 10, the 3 rd buffer being harder than the 2 nd buffer 28, and abutting against the handle body 20 after elastic deformation of the 2 nd buffer 28. When an impact exceeding the impact absorbing function of the 2 nd cushion material 28 is applied to the handle body 20, the 3 rd cushion material 29 prevents the handle body 20 from directly abutting against the handle shaft 10. Accordingly, the impact absorbing function of the assist grip 1 can be improved.
According to embodiment 1, the connecting mechanism 12 has a through hole 10e and a connecting member 21, wherein the through hole 10e penetrates the handle shaft 10 in a direction orthogonal to the impact direction; the connecting member 21 penetrates the through hole 10e and is connected to the handle body 20. The connection member 21 is provided with flat surfaces 21a and 21b parallel to the impact direction. The receiving surfaces 10f, 10g of the through hole 10e are in sliding contact with the flat surfaces 21a, 21b. Therefore, the connection member 21 can move in parallel back and forth in the through hole 10e in a state where rotation around the shaft is restricted. Accordingly, the lower portion of the handle body 20 is slidably connected to the lower portion of the handle shaft 10.
Therefore, by the connecting member 21 not rotating around the shaft but moving in parallel in the impact direction (the radial direction of the connecting member 21), the handle body 20 slides in the impact direction. Accordingly, the impact in the impact direction can be absorbed.
According to embodiment 1, the through hole 10e of the handle shaft 10 has a long groove hole shape long in the impact direction. The inner surface of the through hole 10e is provided with receiving surfaces 10f and 10g. Therefore, the connecting mechanism 12 having a simple structure can reliably perform the sliding operation of the handle body 20 with respect to the handle shaft 10.
According to embodiment 1, there are elastomer layers 26, 27 on the front and rear (outer surfaces in the impact direction) of the handle body 20. Therefore, the elastic body layers 26 and 27 can absorb the impact in the impact direction. Accordingly, the burden of the user is further reduced.
Fig. 8 to 11 show an assist grip 2 according to embodiment 2. As in embodiment 1, the assist handle 2 of embodiment 2 is attached to a cylindrical handle attachment portion 54a provided at the front of the main body case 54. The assist handle 2 of embodiment 2 has a handle shaft 30 and a handle main body 40. The handle shaft 30 extends from the handle attachment portion 54a in a direction substantially orthogonal to the impact direction.
As in embodiment 1, an elliptical flange portion 30b and an annular fastening portion 30a are integrally provided on the upper portion of the handle shaft 30. The fastening portion 30a is displaced in the diameter-reducing direction by tightening the fixing screw 31. The handle shaft 30 is coupled to the handle attachment portion 54a by positioning the handle attachment portion 54a on the inner peripheral side of the fastening portion 30a and tightening the fixing screw 31.
As in embodiment 1, a plurality of engaging concave portions 30c are provided on the inner peripheral side of the fastening portion 30a. By fitting the engaging convex portion 54b (see fig. 1) on the handle attachment portion 54a side into any of the engaging concave portions 30c, the position of the handle shaft 30 about the output axis P is fixed.
By unscrewing the fixing screw 31, the fastening portion 30a is loosened with respect to the coupled state of the handle mounting portion 54a, so that the assist handle 2 can be detached from the handle mounting portion 54a. Further, by loosening the coupled state of the fastening portion 30a with respect to the handle attachment portion 54a, the position of the handle shaft 30 about the output axis P can be changed.
As shown in fig. 10 and 11, the handle body 40 has a cylindrical shape covering the periphery of the handle shaft 30. The handle body 40 is supported by the handle shaft 30 below the flange portion 30 b. An opening 40a that opens laterally in a curved shape is provided in an upper portion of the handle body 40. The opening 40a is substantially closed by the flange 30b of the handle shaft 30. The grip portion of the handle body 40 is restricted at the upper end thereof by the laterally enlarged opening 40a, so that the gripping performance of the assist handle 2 can be improved.
The handle body 40 is connected to the lower end portion of the handle shaft 30 by the connection mechanism 32. As shown in fig. 10, a pair of side width portions 30d are provided at the lower end portion of the handle shaft 30, and the pair of side width portions 30d have left and right flat surfaces 30da, 30db. The handle body 40 has left and right connection base portions 40b and 40c integrally provided at a lower end portion thereof. The opposite side wide portion 30d of the handle shaft 30 is relatively displaced in the front-rear direction and is interposed between the left and right connection base portions 40b, 40c.
1 through hole 30e is provided in the handle shaft 30 at the opposite side width portion 30 d. The through hole 30e is mounted with its axis parallel to the flat surfaces 30da, 30db of the wide-side portion 30 d. 1 connection member 33 is inserted into the through hole 30e. The connection member 33 is inserted into the through hole 30e in a state of being movable in the axial direction with respect to the through hole 30e.
As shown in fig. 11, a narrow portion 30f having a smaller width in the front-rear direction is provided at the lower portion of the handle shaft 30. The narrow portion 30f is provided by making the lower portion of the opposite wide portion 30d narrow in the front-rear direction. The connecting member 33 protrudes forward and backward from the narrow portion 30f.
Support pedestal portions 40d, 40e are provided in front of and behind the lower inner periphery of the handle body 40. The narrow portion 30f of the handle shaft 30 is interposed between the support base seats 40d and 40e. The distance between the front and rear support pedestal portions 40d, 40e is set to a value such that the narrow portion 30f can be displaced a sufficient distance in the front-rear direction.
The front and rear portions of the connection member 33 are supported by the front and rear support pedestal portions 40d, 40e. The connecting member 33 is supported by the support pedestal portions 40d and 40e so as to be immovable in the axial direction. The front and rear end portions of the connecting member 33 protrude into recesses 40f and 40g provided in the handle body 40. The recesses 40f, 40g are closed by end caps 41, 42, respectively. The left and right end portions of the connection member 33 are covered with end caps 41, 42. A diameter-enlarging portion 40h having a curved diameter is provided at a lower portion of the handle body 40. The left and right end caps 41, 42 are fitted into the concave portions 40f, 40g so as not to be exposed along the curved shape of the enlarged diameter portion 40h.
As shown in fig. 11, the 1 st buffers 43 and 44 are interposed between the front surface of the side width portion 30d of the handle shaft 30 and the handle body 40, and between the rear surface of the side width portion 30d and the handle body 40, respectively. The impact in the impact direction of the handle body 40 is absorbed by the 1 st cushioning members 43, 44.
The 2 nd buffers 45 and 46 are interposed between the opening 40a of the handle body 40 and the base 30g of the handle shaft 30 on the tool body 51 side. The 2 nd buffers 45, 46 are sandwiched on the front surface side and the rear surface side in the impact direction with respect to the base 30g of the handle shaft 30. The front and rear 2 nd cushioning members 45, 46 mainly absorb the impact on the upper side of the handle main body 40.
As in embodiment 1, the 3 rd buffer 47 is attached to the handle shaft 30 below the 2 nd buffers 45 and 46. The 3 rd buffer 47 is mounted so as to extend over the entire circumference of the handle shaft 30. The 3 rd buffer 47 is, for example, a rubber O-ring. When an impact exceeding the impact absorbing capacity of the 2 nd cushion 45, 46 is applied to the handle body 40, the handle body 40 abuts against the 3 rd cushion 47. Accordingly, the handle body 40 is prevented from directly abutting against the handle shaft 30. Accordingly, the impact absorbing capability of the assist grip 2 can be improved.
As shown in fig. 8,9 and 11, elastomer layers 48 and 49 are respectively coated on the front and rear surfaces of the handle body 40. Anti-slip of the user's hand is achieved by the elastomer layers 48, 49 and shock in the direction of the impact is absorbed. As in embodiment 1, the elastic body layers 48 and 49 are coated on only the front and rear surfaces of the handle body 40, and the elastic body layers are omitted on the left and right side surfaces. The elastic body layers 48, 49 are integrally molded to the handle body 40 as a harder resin layer.
According to embodiment 2 configured as described above, in the connection mechanism 32 of the assist handle 2, the handle body 40 slides in the impact direction with respect to the handle shaft 30, so that the impact in the impact direction can be absorbed. Accordingly, the impact absorbing function in the impact direction with respect to the user gripping the handle body 40 can be further improved. Accordingly, the burden on the user of the impact tool 50 is reduced.
According to embodiment 2, the connecting mechanism 32 has a through hole 30e and a connecting member 33, wherein the through hole 30e penetrates the handle shaft 30 in the impact direction; the connecting member 33 is inserted through the through hole 30e so as to be axially displaceable. By the movement of the connection member 33 in the impact direction (the axial direction of the connection member 33) within the through hole 30e of the handle shaft 30, the handle body 40 slides in the impact direction with respect to the handle shaft 30. Accordingly, the impact on the handle body 40 can be absorbed.
In the coupling mechanism 32 of embodiment 2, the handle body 40 is slid in the impact direction by the coupling member 33 extending in the front-rear direction with respect to the handle shaft 30 and moving in the axial direction (front-rear direction). In the connection mechanism 12 of embodiment 1, the handle body 20 is slid in the impact direction by the connection member 21 extending in the left-right direction with respect to the handle shaft 10 and moving in the radial direction (front-rear direction). In embodiment 1 and embodiment 2, the extending directions of the connection members 21, 33 are different.
Further modifications may be made to embodiments 1 and 2. As the impact tool, a hammer drill that impacts the drill B while rotating the drill B is exemplified, but the auxiliary handles 1 and 2 exemplified may be applied to an impact tool that only impacts a tip tool, such as an electric hammer tool used in a chisel work.
In the embodiments 1 and 2, the detachable auxiliary handles 1 and 2 are illustrated, but the illustrated connecting mechanisms 12 and 32 may be applied to an auxiliary handle provided to a tool body so as to be detachable.
The impact tool may be an AC machine using a commercial power supply, in addition to a DC machine using the rechargeable battery pack 70 as a power supply.
The assist grip 1 of embodiment 1 and the assist grip 2 of embodiment 2 are examples of the assist grip for an impact tool according to claim 1 of the present invention. The drill B according to embodiment 1 or 2 is an example of the tip tool according to claim 1 of the present invention. The tool body 51 of the 1 st and 2 nd embodiments is an example of the tool body according to the 1 st embodiment of the present invention.
The front of the 1 st and 2 nd embodiments is an example of the impact direction in the 1 st embodiment of the present invention. The handle shaft 10 of embodiment 1 and the handle shaft 30 of embodiment 2 are examples of the handle shaft according to 1 aspect of the present invention. The handle body 20 of embodiment 1 and the handle body 40 of embodiment 2 are examples of the handle body according to claim 1 of the present invention. The connection mechanism 12 of embodiment 1 and the connection mechanism 32 of embodiment 2 are examples of the connection mechanism according to 1 aspect of the present invention.
Claims (11)
1. An auxiliary handle for an impact tool, which is characterized in that,
comprises a handle shaft, a tubular handle body and a connecting mechanism, wherein,
the handle shaft extends from a tool body that reciprocates a tip tool in an impact direction so as to intersect the impact direction;
the handle body covers the handle shaft;
the connecting mechanism connects the handle body to the tip end portion of the handle shaft so as to be slidable in the impact direction.
2. The auxiliary handle for impact tool according to claim 1, wherein,
the handle includes a 1 st cushioning material provided between the tip end portion of the handle shaft and the handle body, and configured to absorb an impact of the handle body on the handle shaft in the impact direction.
3. The auxiliary handle for impact tool according to claim 2, wherein,
the tool includes a 2 nd buffer provided between the tool body side base of the handle shaft and the handle body, and configured to absorb an impact of the handle body on the handle shaft in the impact direction.
4. An auxiliary handle for an impact tool according to claim 3, wherein,
the 2 nd cushioning member has a lateral side portion and a longitudinal side portion, wherein the lateral side portion is adjacent to the handle shaft in a direction orthogonal to the impact direction; the longitudinal side portion is thicker than the lateral side portion and is adjacent to the handle shaft in the impact direction.
5. An auxiliary handle for an impact tool according to claim 2 or 3, wherein,
the handle shaft is provided with a 3 rd buffer member, which is harder than the 2 nd buffer member and abuts against the handle body after the 2 nd buffer member is elastically deformed.
6. The auxiliary handle for an impact tool according to any one of claims 1 to 5, wherein,
the connecting mechanism has an abutment surface on at least one of the handle shaft and the handle body, the abutment surface extending in the impact direction, and the other of the handle shaft and the handle body abutting against the abutment surface.
7. The auxiliary handle for impact tool according to claim 6, wherein,
the connecting mechanism is provided with a through hole and a connecting part, wherein the through hole penetrates through the handle shaft along the direction orthogonal to the impact direction; the connecting part penetrates through the through hole and is connected with the handle main body,
the connecting member has a flat surface parallel to the impact direction as the abutment surface,
the through hole of the handle shaft has a receiving surface facing the flat surface of the connecting member as the abutment surface.
8. The auxiliary handle for impact tool according to claim 7, wherein,
the through hole of the handle shaft has a long groove hole shape long in the impact direction, and the receiving surface is provided on an inner surface of the through hole.
9. The auxiliary handle for an impact tool according to any one of claims 1 to 5, wherein,
the connecting mechanism is provided with a through hole and a connecting part, wherein the through hole penetrates through the handle shaft along the impact direction; the connecting part penetrates through the through hole and is connected with the handle main body.
10. The auxiliary handle for an impact tool according to any one of claims 1 to 9, wherein,
an elastic body layer is provided on an outer surface of the handle body in at least the impact direction, and the elastic body layer is integrally formed with a resin layer harder than the elastic body layer.
11. An impact tool, characterized in that,
an auxiliary handle for an impact tool as claimed in any one of claims 1 to 10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022136620A JP2024033183A (en) | 2022-08-30 | 2022-08-30 | Auxiliary grip for impact tools |
| JP2022-136620 | 2022-08-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117620978A true CN117620978A (en) | 2024-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310675788.5A Pending CN117620978A (en) | 2022-08-30 | 2023-06-08 | Auxiliary handle for impact tool and impact tool |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240066680A1 (en) |
| JP (1) | JP2024033183A (en) |
| CN (1) | CN117620978A (en) |
| DE (1) | DE102023118481A1 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7434199B2 (en) | 2021-03-08 | 2024-02-20 | 株式会社東芝 | turbine rotor blade |
-
2022
- 2022-08-30 JP JP2022136620A patent/JP2024033183A/en active Pending
-
2023
- 2023-06-08 CN CN202310675788.5A patent/CN117620978A/en active Pending
- 2023-06-29 US US18/215,984 patent/US20240066680A1/en active Pending
- 2023-07-12 DE DE102023118481.4A patent/DE102023118481A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024033183A (en) | 2024-03-13 |
| DE102023118481A1 (en) | 2024-02-29 |
| US20240066680A1 (en) | 2024-02-29 |
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